Ten years ago, as a reaction to over-amplification of musicals, Scott Siegel had the crazy idea that there might be an audience for a concert of Broadway show tunes performed the way they used to be sung: without microphones. And Scott had the perfect place to try out his theory, the acoustically wonderful Town Hall on West 43rd St. With no money, but the support of a great many singers who wanted, literally, to be heard in a way that was no longer possible on Broadway, he launched the first Broadway Unplugged, boasting "Sound Design by God."